Getting correct Z height
I have downloaded the large parallelogram to use to set the Z height but in order to get the filament to be tight across the rows it is getting squished much more than what the pictures show as correct. I am currently using a Z height of -1.62 which has been doing the models quite well but when I look at the test piece across the front of the sheet it is pretty flat! I have tinkered with this a bit but when I go higher, -1.70 or more, the filament starts to separate and the bottom is not near as smooth. I'm a newbie so any suggestions will be appreciated.
RE: Getting correct Z height
Well, impossible to give advice without pictures.
But: First layer calibration is generally an issue in the beginning. It takes some time to judge the results correctly. Believe me, you will get there soon.
Generally speaking: get the first layer squished so you see basically one fused homogenous layer when removing the part from the build plate and looking at the bottom layer from below. Better be a little too low and have some small filament traces build up on the first layer (second layer will fix that) than too high. First layer is all about adhesion. Just do the calibration (build in or otherwise) and compare the results with the pictures you find in the documentation and countless "how to threads", if you think you are close or spot on: start printing, if you run into adhesion issues (stuff separating from print bed): clean you bed (see other threads) and revisit the first layer calibration (or post pics from the underside of your models - choose lighting wisely when taking the pictures).
It's a process, you'll figure it out - don't obsess over it...
If at first you don't succeed, skydiving is not for you.
Find out why this is pinned in the general section!
RE: Getting correct Z height
What @robin said.
Btw, when you say you go ‘higher’ from -1.62 to -1.70, that’s actually going ‘lower’ or closer to the bed. The more negative the value, the closer the nozzle is to the print sheet.
Here’s a link to a post that addresses several of the items robin pointed out. Read the reply just below the OP’s post in this thread for some great info on Z heights and sheet cleaning.
Cheers